Automated animated display device

ABSTRACT

A device for displaying and animating a plurality of transparencies in succession. A cabinet is provided with a polarizing light projection means located in its central section and an endless carrier for removing transparencies from a storage section to a viewing window and back to the storage section. A transfer section is provided so that the transparencies may be moved to and from display and storage without interfering with the light projection. Animation is provided by a rotary polarizer, a stationary polarized sheet and transparencies carrying embossed motion lines.

R 57: v QC 1 nnu Dnfik/i XR 3117874991 was 7 7 Siksai 1 1 Jan. 29 1 97411 AUTOMATED ANIMATED DISPLAY 2,061,030 11/1936 Heath ..1 40/36 DEVICE934,890 9/1909 Davidson 40/36 UX [76] Inventor: Anthony Siksai, 2705Lahser Rd.,

Bloomfield Hills, Mich. 48013 [22] Filed: Oct. 17, 1972 [21] Appl. No.:298,349

[52] US. Cl 40/106.52, 40/36, 40/7807 [51] Int. Cl 350 159, G09f 11/32[58] Field of Search..... 40/36, 32, 78, 78.03, 78.07,

Primary Examiner Joseph S. Reich Assistant Examiner-John F. PitrelliAttorney, Agent, or Firm [57] ABSTRACT A device for displaying andanimating a plurality of transparencies in succession. A cabinet isprovided with a polarizing light projection means located in its centralsection and an endless carrier for removing transparencies from astorage section to a viewing window and back to the storage section. Atransfer section is provided so that the transparencies may be moved toand from display and storage without interfering with the lightprojection. Animation is provided by a rotary polarizer, a stationarypolarized sheet and transparencies carrying embossed motion lines.

10 Claims, 9 Drawing Figures TEDJM 29 1974 3Q787l991 sum 1 or 4PATENTEDJAN 29 m4 SHEET 2 BF 4 FIG. 5.

PATENTEI] JAN 29 i974 SHEET u 0F 4 1Q AUTOMATED ANIMATED DISPLAY DEVICEBACKGROUND OF THE INVENTION The present invention is directed to anautomated display device for the successive display of transparenciescarrying advertisements or the like, wherein the transparencies areanimated by polarized light.

The prior art discloses a variety of automated display devices for thesuccessive display of sheets bearing advertisements or other legend.Because such devices are commonly used in store-front windows, onshowroom floors, etc., where space is of premium value, there hasexisted a need in the art to manufacture such devices in compact units.One approach to the manufacture of compact units of this type involvesthe use of a display cabinet having a storage area wherein a number ofdisplay sheets are suspended from an inclined ramp by means ofsupporting rods affixed to the upper edge of each display sheet (see forexample, US. Pat. No. 1,038,149 issued Sept. 10, 1912 to Kelley, US.Pat. No. 1,251,555 issued Jan. 1, 19l8 to Meese, and U.S. Pat.- No.2,135,207 issued Nov. l, 1938 to Bramer). While such devices provide anautomated display in a compact cabinet, they are unsuitable for use indisplaying animated transparencies which require projection of polarizedlight from a source within the display cabinet. Moreover, these devicesmay tend to jam or bind due to fractional drag at the pulleys and otherdefects in the design of the sheet transport means. The prior artdevices also tend to be somewhat noisy which noise is created by thedisplay sheets dropping onto the inclined ramp and/or by the nature ofengagement of the sheet supporting rods by the transport means.

SUMMARY OF THE INVENTION The present invention provides a display.device suitable for use in displaying display sheets animated bypolarizing light by providinga transfer section within the cabinetthrough which the transparencies may be routed in such a way as to avoidinterference with the projection of the polarizing light. The device ofthe present invention avoids the problem of the binding and jamming ofthe display sheets by providing the cabinet with an anti-drag device andan improved transport means. The improved transport means, together witha spring damping device, also serves to minimize the operating noise.

In accordance with one embodiment of the present invention an automateddevice is provided for the successive display of a plurality oftransparencies wherein each transparency -is individually suspended froma supporting rod and wherein each transparency is moved by a transportmeans between a storage area and a viewing window where the transparencyis illuminated or animated by a light source situated within the centralportion of the cabinet. The cabinet is provided with a storage section,a central section including the viewing window, and a transfer section,with the sections being arranged one above the other with the centralsection between the storage and transfer sections. A light projectionmeans is provided for projecting light from the central section of thecabinet out through the viewing window. An endless carrier is providedfor engaging each end of each supporting rod for transporting the rodsin a vertical plane past the viewing window and consecutively from saidstorage section into said central section to said transfer section aridback into the central section and return to the storage section. Therods move in a generally horizontal path through the storage andtransfer sections in a manner that the transparencies suspended from therods do not interfere with the light projection. The device alsoincludes a driving means for driving the endless carrier and for holdingeach transparency stationary within the viewing window for apredetermined period of time.

The present invention also provides an improved transport means whereinthe endless carrier is provided with at least one pair of front and rearhooks facing each other in a closely spaced relationship, and a cammingmechanism which is engaged by-a tripping member provided on the endlesscarrier in such a way as to lift a display sheet by its supporting rodfrom an inclined ramp provided in the storage area and into the spacebetween the hook pair where it is engaged by the trailing hook or rearhook and transported as previ ously indicated.

An anti-drag device is also included to prevent jamming by canting thetransparency toward the center of the cabinet as its suspending rodpasses over an upper pulley.

Accordingly, it is an object of the present invention to provide anautomated device suitable for the display and animation of sheetsbearing advertisement or other legend.

It is another object of the present invention to provide an automationmeans forthe successive display of a plurality of transparencies in acabinet wherein the transparencies are illuminated by rear projection.

his a further object of the present invention to provide such anautomated device wherein the display sheets are stored compactly in astacked relationship and wherein removal and return to the storage areais effected with a minimum of noise.

It is a further object of the present invention to pro vide such adevice that will minimize occurrences of jamming and binding.

Other objects and features of the novelty of the present invention willbe specifically pointed out or will otherwise become apparent byreference to the following description taken in conjunction with theaccompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front elevational view, incross-section, of the automated animated display device of theinvention;

FIG. 2 is a sectional view taken along the line 2-2 of FIG. 1;

FIG. 3 is a detailed fragmentary view of the interior of the storagesection showing the bottom portion of the transport mechanism;

FIG. 4 is a detailed fragmentary view of the transport hooks associatedwith the endless carrier of the transport mechanism;

FIG. 5 is 'a detailed fragmentary view showing the transport hooks ofFIG. 4 in engagement with a dropout mechanism; v

FIG. 6 is a detailed fragmentary view of a portion of the storage areashowing the camming mechanism.

FIG. 7 is a detailed fragmentary view of the anti-drag device;

FIG. 8 is a detailed-fragmentary view indicating the operation of thetransport means within the transfer section; and

FIG. 9 is a detailed fragmentary view illustrating the operation of theanti-drag device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS For purposes of illustration,FIGS. 1-8 show an embodiment of the present invention that includesmeans for automated display of a plurality of transparencies insuccession in combination with means for the animation of eachtransparency, as it is displayed. FIGS. 11 and 2 show a cabinet having astorage section, a central section, and a transfer section, generallydesignated by the numerals 12, 14 and 16, respectively, arranged oneabove the other with the central section 14 between the storage section12 and the transfer section 16. FIG. 1 shows a viewing window 18 locatedat the front side of the central section 14.

The cabinet encloses a plurality of display sheet as semblies, generallydesignated by the numeral 249. Each display sheet assembly includes asupporting rod 22 and a transparency 24suspended therefrom. Light isprojected from a suitable source within the cabinet such as lamps 26,28, 30, and 32, onto the rear of the transparency 24 situated withinviewing window 18.

Two timing belts 34 and 36 form an endless carrier for the transport ofthe display sheet and rod assemblies. Each timing belt is arranged overa set of four pulleys. With reference to FIG. 2, the travel of timingbelt 36 is clockwise around the drive pulley 38 and pulleys 40, 42 and44. In similar fashion, belt 34 is driven by a drive pulley 46, andadditionally travels over ptilleys 48, 50 and 52. Drive pulleys 38 and46 are mounted on a drive shaft 54 which is driven by a chain or belt 55which is, in turn, driven by a motor 47.

Each timing belt is provided with a number of hook pairs, generallydesignated by the numeral 56. Each hook pair, best illustrated in FIG.4, with respect to the direction of the travel of the belt, includes afront or leading hook 58 and a rear or trailing hook so. These hookpairs 56 serve to catch and transport the display sheet and supportingrod assemblies 2h vertically through the central section and generallyhorizontally through the transfer section.

FIG. 3 shows a portion of the storage section having an inclined ramp 62mounted therein for the support of the stored display sheet and supportrod assemblies. The force of gravity tends to move these displayassemblies down the ramp, with the lowermost assembly abutting a stop ortongue portion 64 of the inclined ramp 62. A cammin'g mechanism,generally designated by the numeral 66, is mounted adjacent to the lowerextremity and tongue 64 of the inclined ramp 62. The carnming mechanism66 is rotatably mounted on a shaft 68 and is provided with two arms, atripping arm 70 and a lifting arm 72. The camming mechanism is shown inFIG. 3 in a disengaged position with the lifting arm 72 biased against astop member 74 by means of the spring 76. Each leading hook 58 of thehook pairs 56 is provided with a roller extension 78 that engages theindent 71 of the tripping arm '78, which engagement serves to rotate thelifting arm 72 upward to lift the lowermost supporting rod into thespace between the front and rear hooks. The rear or trailing hook 60engages and retains the supporting rod of that assembly for transport inthe manner previously described. As the roller member 78 leaves theindent 71 of the tripping arm 70, the cam spring 76 operates to bias thelifting arm 72 back to a disengaged position against the cam stop 74.

The lowermost supporting rod 22 has one end trapped in the indent of thetrailing hook 60 on timing belt 36 and its opposite end or extremitytrapped by the corresponding trailing hook (not shown) carried by belt34. After the display sheet and rod and assembly is picked up in themanner described above, it travels around drive pulleys 38 and 46 and iscarried vertically upward. As the display sheet and rod assembly 20approaches the viewing window 18, the supporting rod 22 trips a timerswitch (not shown). The timer switch then operates to disconnect thedrive motor 47, to activate a solenoid break 94 mounted on the motor 47,and to engage a timer 96. This operation causes the transparency 24 tobe suspended within the viewing window 18 for a predetermined period oftime. At the end of the predetermined time, the timer 96 operates torelease break 94, whereupon the belts are again placed in motion untilthe timer switch 92 is again tripped by a supporting rod 22.

After leaving the viewing window 18, the display sheet and rod assembly20 continues its upward vertical movement through the central section14, to pulleys 40 and 48, located within the transfer section. A travelguard 39 prevents the supporting rod 22 from disengaging from rear hooks60 during travel around drive pulleys 38 and 46. At pulleys 40 and 48,the vertical movement of the display sheet and rod assembly is convertedto movement in a generally horizontal direction. As the display sheetand rod assembly passes over pulleys 40 and 48, the change in directioncoupled with the friction between the supporting rods and the transporthooks, produces a drag that tends to force the bottom portion of thetransparency to swing backward or outwardly away from the center of thecabinet. This swinging effect could cause the bottom portion of an upperdisplay sheet and rod assembly to jam between the cabinet wall 1 l andtrailing sheet and rod assemblies. This effect is prevented by at leastone anti-drag device, generally designated by the numeral 80 in FIG. 7.The antidrag device 80 is a lever member rotatably mounted on a shaft82. The lower extremity of the lever member or drag eliminator arm 84is'biased backwardly against the front cabinet wali 11 by means of aspring 86. As the lead hook 58 approaches pulley 40, the supporting rod22 engages the upper arm portion 88 of lever member 84, causing it torotate counterclockwise about shaft 82. The lower extremity of levermember 84 is provided with a rubber button 90. The counterclockwiserotational motion of the anti-drag device 80 carries the rubber button90 into engagement with the transparency 24, causing it to cantinwardly, thereby counteracting the tendency to swing against the frontcabinet wall 11.

The display sheet and rod assembly continues to follow a generallyhorizontal path until it passes over pulleys 42 and 50. As it passesover pulleys 42 and 50, the force of gravity causes it to fall from'thetrailing hook 50 into the leading hook 58, as shown in FIG. 8. A travelguard 43 insures that the rod 22 enters hook 58.

From pulleys 42 and 50 the display sheet and rod assembly 20 follows agenerally vertical path downwardly through the central section 14 ofcabinet and into the storage section where the supporting rod 22 passesaround pulleys 44 and 52. The supporting rod 22 is carried around pulley44 until it hits a transport drop-out rod or a disengagement rod 98mounted on the shaft of pulley 44. Engagement with rod 98 forcessuspending rod 22 out of hook 58 from which it falls onto a dampeningspring 100. The supporting rod 22 slides off the dampening spring 100onto the surface of the inclined storage ramp 62. The purpose of thedampening spring 100 is to minimize noise.

The arrangement described above results in each transparency stopping atfive points on the carrier belts between the time it leaves the storageramp 62 and the time when it is returned thereto. The first stop is at apoint just after it is picked up by the camming mechanism 66. The secondstop is at the viewing window 18. The third is just before being kickedby the anti-drag device 80. The fourth stop is just after transfer fromthe trailing hooks to the lead hooks at pulleys 42 and 50 and the fifthis just before striking the disengagement rod 98.

In the preferred embodiment, means to animate the display transparencies24 is provided. A preferred animation means is shown 'in FIGS. 1 and 2as including a rotary polarizer 102, mounted between lamps 26, 28, t

30 and 32 and the viewing window 118. The rotary polarizer is driven bya motor 104. Each transparency 24 includes a light-intercepting sheetthat carries a pattern of embossed motion lines. Such light-interceptingsheets are described in US. Pat. No. 3,609,003 issued Sept. 28, 1971, toAnthony Siksai, the teachings of which are hereby incorporated byreference. The preferred animation effect also requires a stationarypolarized sheet. The stationary polarized sheet may either be locatedpermanently within the viewing window 18 or, alternatively, a polarizedsheet may be carried with each of the transparencies 24. This animationtechnique is more fully described in US. Pat. No. 3,437,401 issued Apr.8, 1969 to Anthony Siksai, the teachings of which are also herebyincorporated by reference. Other conventional animation techniques mayalso be used in connection with the device of the present invention.

As will be appreciated from a consideration of the foregoingdescription, the device of the present invention represents a simpleconstruction requiring only a few moving parts and is designed forperiods of extended continuous operation with a minimum of maintenance.

Changes and modifications in the device described above will becomeapparent to those skilled in this art, and obvious and equivalentchanges are tended to be included in the scope of this invention.

1 claim:

1. An automated device for the successive display of a plurality oftransparencies, wherein each transparency is suspended from a supportingrod, said automated device comprising:

a cabinet enclosing the transparencies, said cabinet comprising astorage section, a central section having at least one window forviewing, and a transfer section, said sections being arranged one abovethe other with the central section between the storage and transfersections;

' light projection means for projecting light from said central sectionontothe rear of one of said transparencies for illuminating thetransparency in said window;

an endless carrier and rod engaging means attached to said carrier forengaging each end of each rod for transporting said rods in a verticalplane past said viewing window and consecutively from said storagesection, into said central section, to said transfer section, back tosaid central sectionand to said storage section; said rods movinggenerally horizontally through said storage and transfer sections in amanner such that the transparencies depending therefrom do not interferewith the light passing through said window;

means for driving said endless carrier intermittently to position eachtransparency in said window for a predetermined period of time;

an inclined ramp mounted within said storage section, said transparencysupporting rods within the storage section being suspended on the uppersurface of said inclined ramp; and

a camming mechanism, rotatably mounted within said cabinet, forsuccessively lifting said transparency supporting rods from said rampinto position for engagement by said rod engaging means, said cammingmechanism comprising a lifting arm, biasing means to retain said liftingarm in a disengaged position, a second arm for engaging an extensionprovided on said endless carrier, which engagement operates to rotatethe lifting arm upward to remove a supporting rod and suspended sheetfrom said inclined ramp'and into said position.

2. An automated device for the successive display of a plurality oftransparencies, wherein each transparency is suspended from a supportingrod, said automated device comprising:

a cabinet enclosing the transparencies, said cabinet comprising astorage section, a central section having at least one window forviewing, and a transfer section, said sections being arranged one abovethe other with the central section between the storage and transfersections;

light projection means for projecting light from said central sectiononto the rear of one of said transparencies for illuminating thetransparency in said window; 7

an endless carrier and rod holding means attached to said carrier forengaging each end of each rod for transporting said rods in a verticalplane past said viewing window and consecutively from said storagesection, into said central section, to said transfer section, back tosaid central section and to said storage section; said rods movinggenerally horizontally'through saidv storage and transfer sections in amanner such that the transparencies depending therefrom do not interferewith the light passing through said window;

means for driving said endless carrier intermettently to position eachtransparency in said window for a predetermined period of time; and

an anti-drag device comprising a rotatably mounted lever arm within thepath of the supporting rod, said lever am being rotated by engagementwith the rod in such a manner as to cause the lower extremity of saidlever arm to force the bottom portion of the suspended transparencytoward the interior of the cabinet.

3. The device of claim 2 additionally comprising means adjacent to theapproach to said storage section for removal of supporting rods fromengagement with said rod holding means and for deposit within saidstorage section.

4. The device of claim 2 wherein said rod holding means comprises atleast one pair of spaced front and rear hooks attached to said endlesscarrier for the transport of the transparencies, said pair of hooksbeing arranged with their openings in a facing relationship.

5. The device of claim 4 additionally comprising lifting means tosuccessfully lift said transparency supporting rods into the spacebetween said pair of hooks, so that the rear hook engages a supportingrod for movement from said storage section.

6. The automated device of claim 5 wherein said storage section isprovided with an inclined ramp, said transparency supporting rods withinthe storage section being suspended on the upper surface of saidinclined ramp and sliding downwardly on said inclined ramp upon removalof the lowermost supporting rod by said lifting means.

7. The display device of claim 6 wherein said lifting means is a cammingmechanism rotatably mounted within said cabinet, said camming mechanismcomprising a lifting arm, biasing means to retain said lifting arm in adisengaged position, a second arm for engaging an extension provided onsaid endless carrier, which engagement operates to rotate the liftingarm upward to remove a supporting rod and suspended sheet from saidinclined ramp and into the space between said front and rear hooks.

8. The automated device of claim 2 further comprising a timing device,and means responsive to said timing device for stopping said means fordriving said endless carrier so that a transparency will remainstationary within the viewing window for a predetermined time.

9. The automated device of claim 2 additionally comprising a motordriven rotatable polarized sheet mounted between said light projectionmeans and the viewing window, and wherein each transparency comprises alight intercepting sheet having motion lines embossed thereon andwherein the viewing window is provided with a stationary polarizedtransparency.

10. The automated device of claim 2 additionally comprising projectionmeans comprising at least one light source and a motor driven rotatablepolarized sheet mounted within the cabinet between said light source andthe viewing window, and wherein each transparency comprises a lightintercepting sheet having embossed motion lines thereon and a polarizedsheet.

Patent No. 3,787,991- Dated January 29y1974 Anthony Siksai Inventor(s) 7It is certified that error appears in the above-identified patent andthat said Letters Patent are hereby corrected as shown below;

Add the following claim:

11 In an automated display device having an endless I carrier fortransporting assemblies comprising display sheets suspended fromsupporting rods to and from a viewing area, means for removing saidsheet and rod assemblies from a support within a storage area andreturning said sheet and rod assemblies to the support comprising: 1

at leastone pair of spaced front and rear hooks, said hooks openingtoward each other; and f a camming mechanism rotatably mounted withinthe display device comprising a lifting arm, biasing'means to retainsaid lifting arm in a disengaged position, a second arm for engaginganextension provided on said front hook of the endless carrier, whichengagement operates to' rotate said lifting arm upward to remove the rodand sheet-assembly from said support and into the space between saidfront and rear hooks.

0n the cover sheet "10 Claims" should read 11 Claims Signed and sealedthis 20th day of August 1 974.

(SEAL) Attest: I

McCOY M. GIBSON, JR. I C. MARSHALL DANN Attesting Officer Commissionerof Patents FORM PO-IOSO (10-69) USCOMM-DC cove-Pea 0.5.GOVERNMENTIRINHNG OFFICE 21". OSlG-38l,

1. An automated device for the successive display of a plurality oftransparencies, wherein each transparency is suspended from a supportingrod, said automated device comprising: a cabinet enclosing thetransparencies, said cabinet comprising a storage section, a centralsection having at least one window for viewing, and a transfer section,said sections being arranged one above the other with the centralsection between the storage and transfer sections; light projectionmeans for projecting light from said central section onto the rear ofone of said transparencies for illuminating the transparency in saidwindow; an endless carrier and rod engaging means attached to saidcarrier for engaging each end of each rod for transporting said rods ina vertical plane past said viewing window and consecutively from saidstorage section, into said central section, to said transfer section,back to said central section and to said storage section; said rodsmoving generally horizontally through said storage and transfer sectionsin a manner such that the transparencies depending therefrom do notinterfere with the light passing through said window; means for drivingsaid endless carrier intermittently to position each transparency insaid window for a predetermined period of time; an inclined ramp mountedwithin said storage section, said transparency supporting rods withinthe storage section being suspended on the upper surface of saidinclined ramp; and a camming mechanism, rotatably mounted within saidcabinet, for successively lifting said transparency supporting rods fromsaid ramp into position for engagement by said rod engaging means, saidcamming mechanism comprising a lifting arm, biasing means to retain saidlifting arm in a disengaged position, a second arm for engaging anextension provided on said endless carrier, which engagement operates torotate the lifting arm upward to remove a supporting rod and suspendedsheet from said inclined ramp and into said position.
 2. An automateddevice for the successive display of a plurality of transparencies,wherein each transparency is suspended from a supporting rod, saidautomated device comprising: a cabinet enclosing the transparencies,said cabinet comprising a storage section, a central section having atleast one window for viewing, and a transfer section, said sectionsbeing arranged one above the other with the central section between thestorage and transfer sections; light projection means for projectinglight from said central section onto the rear of one of saidtransparencies for illuminating the transparency in said window; anendless carrier and rod holding means attached to said carrier forengaging each end of each rod for transporting said rods in a vErticalplane past said viewing window and consecutively from said storagesection, into said central section, to said transfer section, back tosaid central section and to said storage section; said rods movinggenerally horizontally through said storage and transfer sections in amanner such that the transparencies depending therefrom do not interferewith the light passing through said window; means for driving saidendless carrier intermettently to position each transparency in saidwindow for a predetermined period of time; and an anti-drag devicecomprising a rotatably mounted lever arm within the path of thesupporting rod, said lever arm being rotated by engagement with the rodin such a manner as to cause the lower extremity of said lever arm toforce the bottom portion of the suspended transparency toward theinterior of the cabinet.
 3. The device of claim 2 additionallycomprising means adjacent to the approach to said storage section forremoval of supporting rods from engagement with said rod holding meansand for deposit within said storage section.
 4. The device of claim 2wherein said rod holding means comprises at least one pair of spacedfront and rear hooks attached to said endless carrier for the transportof the transparencies, said pair of hooks being arranged with theiropenings in a facing relationship.
 5. The device of claim 4 additionallycomprising lifting means to successfully lift said transparencysupporting rods into the space between said pair of hooks, so that therear hook engages a supporting rod for movement from said storagesection.
 6. The automated device of claim 5 wherein said storage sectionis provided with an inclined ramp, said transparency supporting rodswithin the storage section being suspended on the upper surface of saidinclined ramp and sliding downwardly on said inclined ramp upon removalof the lowermost supporting rod by said lifting means.
 7. The displaydevice of claim 6 wherein said lifting means is a camming mechanismrotatably mounted within said cabinet, said camming mechanism comprisinga lifting arm, biasing means to retain said lifting arm in a disengagedposition, a second arm for engaging an extension provided on saidendless carrier, which engagement operates to rotate the lifting armupward to remove a supporting rod and suspended sheet from said inclinedramp and into the space between said front and rear hooks.
 8. Theautomated device of claim 2 further comprising a timing device, andmeans responsive to said timing device for stopping said means fordriving said endless carrier so that a transparency will remainstationary within the viewing window for a predetermined time.
 9. Theautomated device of claim 2 additionally comprising a motor drivenrotatable polarized sheet mounted between said light projection meansand the viewing window, and wherein each transparency comprises a lightintercepting sheet having motion lines embossed thereon and wherein theviewing window is provided with a stationary polarized transparency. 10.The automated device of claim 2 additionally comprising projection meanscomprising at least one light source and a motor driven rotatablepolarized sheet mounted within the cabinet between said light source andthe viewing window, and wherein each transparency comprises a lightintercepting sheet having embossed motion lines thereon and a polarizedsheet.